Add a router-api bearer token option for publishing-api
Add a router-api bearer token option for publishing-api

We're going to be adding a Rake task into publishing-api that
checks the status of a document across content-store and
router-api and therefore it needs access to the router-api.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet